应力腐蚀断裂(简称SCC)是材料在应力和腐蚀环境同时作用下,通过某种微观机制使裂纹扩展而导致断裂,这种破坏往往是突然发生的灾难性低应力脆断。LC4高强铝合金对SCC较敏感。为提高此合金的抗SCC性能,根据使用条件,添加缓蚀剂是其中一 Stress corrosion cracking (SCC) is the material under the simultaneous action of stress and corrosion environment, through a micro-mechanism to crack propagation caused by the rupture, this failure is often a sudden catastrophic low-stress brittle fracture. LC4 high-strength aluminum alloy is more sensitive to SCC. To improve the anti-SCC performance of this alloy, one of the corrosion inhibitors is added depending on the conditions of use